QrCode生成二维码

引用类库Gma.QrCodeNet.EnCodeing

主要代码：

CreateQrCode类

using System;
using System.Collections.Generic;
using System.Linq;

namespace _2DCodeCA
{
    using System.IO;
    using Gma.QrCodeNet.Encoding;
    using Gma.QrCodeNet.Encoding.Windows.Render;
    using System.Drawing.Imaging;
    using System.Drawing;
    using System.Drawing.Drawing2D;
    public class CreateQrCode
    {
        public Image Create(string text)
        {
            QrCode code;
            QrEncoder encoder = new QrEncoder(ErrorCorrectionLevel.H);
            Image img = null;
            if (encoder.TryEncode(text, out code))
            {
                var render = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two));
                using (MemoryStream ms = new MemoryStream())
                {
                    render.WriteToStream(code.Matrix, ImageFormat.Png, ms);
                    img = Image.FromStream(ms);
                }
            }
            return img;
        }

        public Image ReviceImage(Image img, int nWidth, int nHeight)
        {
            Image b = new Bitmap(nWidth, nHeight);
            using (Graphics graphics = Graphics.FromImage(b))
            {

                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                graphics.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight), new Rectangle(0, 0, img.Width, img.Height), GraphicsUnit.Pixel);
            }
            return img;
        }

        public Image Create(string text, string logoPath)
        {
            Image imgLogo = Image.FromFile(logoPath);
            Image img=Create(text);
            if (imgLogo.Width != 65 || imgLogo.Height != 65)
            {
                imgLogo = ReviceImage(imgLogo, 65, 65);
            }
            Graphics graphics = Graphics.FromImage(img);
            graphics.DrawImage(imgLogo, img.Width / 2 - imgLogo.Width / 2, img.Width / 2 - imgLogo.Width / 2, imgLogo.Width, imgLogo.Height);
            return img;
        }
    }
}

界面代码:

private void btnCreate_Click(object sender, EventArgs e)
        {
            string str = "姓名：" + txtName.Text + "\n号码：" + txtPhone.Text + "\n性别：" + txtSex.Text;
            CreateQrCode create=new CreateQrCode();
            if (string.IsNullOrWhiteSpace(txtPath.Text))
            {
                img2DCode.Image = create.Create(str);
            }
            else
            {
                img2DCode.Image = create.Create(str, txtPath.Text);
            }

        }

        private void btnPath_Click(object sender, EventArgs e)
        {
            OpenFileDialog open = new OpenFileDialog();
            open.ShowDialog();
            txtPath.Text = open.FileName;
        }

效果图:

文章引用:http://www.tuicool.com/articles/f6ruei

类库下载:http://www.qrcode-generator.com/